Structure and Mechanical Properties of Steel Welding Joints Produced Using Abrasive Waterjet Cutting

Resumo

The structure of welding joints of high-strength steel made using abrasive waterjet cutting has been studied using the methods of optical metallography and scanning electron microscopy supplemented with micro-X-ray spectral analysis. Uniaxial tension and impact bending tests with recording of loading diagrams were carried out on an impact tester. It is established that welding joints have satisfactory strength and toughness. A fractographic analysis of the fracture surface of ruptured and impact samples showed that the revealed defects are irrelevant to the presence of abrasive sand particles in the weld metal and weld-affected zone.